公开(公告)号：US20140188419A1

公开(公告)日：2014-07-03

申请号：US14057544

申请日：2013-10-18

Applicant: University of Electronic Science and Technology of China

Inventor： Hao ZENG ,  Peng YE ,  Kuojun YANG ,  Guang YANG ,  Qinchuan ZHANG

IPC: G01R13/22 ,  G01R35/00

CPC classification number: G01R13/0272 ,  G01R13/0254

Abstract: The present invention provides a method for measuring the waveform capture rate of parallel digital storage oscilloscope. On the basis of double pulse measurement, and in consideration of the asymmetry of acquisition and the refreshing time of parallel DSO, the present invention provides a step amplitude-frequency combined pulse measurement to measure the time for waveform acquisition and mapping Tmap, the number of captured waveforms before LCD refreshing Wacq and the dead time caused by LCD refreshing TDDT, and then calculates the actual measured average WCR of parallel DSO, according to the measured data, so that the WCR of parallel can be measured.

Abstract translation: 本发明提供了一种用于测量并行数字存储示波器的波形捕获率的方法。 在双脉冲测量的基础上，考虑到并行DSO的采集不对称性和刷新时间，本发明提供了一种步进幅度 - 频率组合脉冲测量，以测量波形采集和映射时间Tmap，数量 在LCD刷新Wacq之前捕获的波形和由LCD刷新TDDT造成的死区时间，然后根据测量数据计算并行DSO的实际测量平均WCR，从而可以测量并行WCR。

公开(公告)号：US20180149676A1

公开(公告)日：2018-05-31

申请号：US15879146

申请日：2018-01-24

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Kuojun YANG ,  Wuhuang HUANG ,  Peng YE ,  Qinchuan ZHANG ,  Hao ZENG ,  Duyu QIU ,  Jun JIANG ,  Huiqing PAN ,  Lianping GUO ,  Feng TAN

IPC: G01R13/02

Abstract: A method for oscilloscope 3D mapping in scan mode. The input signal is acquired using a real-time sampling rate which is Dr times higher, thus more sampling points, i.e. Dr acquired data can be obtained during the time interval between two consecutive horizontal pixels. The Dr acquired data are mapped into a same column of the screen to implement fluorescent waveform display. In addition, to realize the scanning display, a flag X is introduced into the three-dimensional database, when the screen refresh signal arrives, the first Ds acquired data are read out from the unread acquired data in FIFO memory. The three-dimensional database is updated from the flag X, which make the leftmost waveform always be the oldest waveform, the rightmost waveform always be the newest waveform. Thus the 3D mapping is realized in scan mode, letting the DSO have a fluorescent waveform display at slow time-base.

公开(公告)号：US20170373638A1

公开(公告)日：2017-12-28

申请号：US15696533

申请日：2017-09-06

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Peng YE ,  Feng TAN ,  Xingqi LIU ,  Duyu QIU ,  Lianping GUO ,  Kuojun YANG ,  Qinchuan ZHANG ,  Huiqing PAN

IPC: H03B5/04 ,  H03B5/32

CPC classification number: H03B5/04 ,  H03B5/32 ,  H03L1/022 ,  H03L1/028

Abstract: The present invention provides a temperature-compensated crystal oscillator based on digital circuit, a closed-loop compensation architecture is employed to realize the high precision compensation of the crystal oscillator. The output frequency f(T) of the TCXO to be compensated is directly connected with the compensation voltage Vc(T) in real time, and the compensation voltage is fed back to the voltage control terminal of the VCXO to be compensated to compensate, so that the output frequency after compensation is equal to the target frequency signal, thus avoiding the frequency shift of output signal caused by temperature hysteresis, i.e. the discrepancy between the temperature acquired by a temperature senor and the real temperature of the resonant wafer in the prior art.

公开(公告)号：US20180364282A1

公开(公告)日：2018-12-20

申请号：US16005763

申请日：2018-06-12

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Qinchuan ZHANG ,  Feng TAN ,  Huiqing PAN ,  Hao ZENG ,  Luonan ZHENG

IPC: G01R13/02

CPC classification number: G01R13/0254

Abstract: The present invention provides a method and apparatus for automatically adjusting the hold-off time of a DSO based on real-time cycle measurements of the system trigger signal: obtaining a cycle sequence by measuring the system trigger signal, the maximum cycle and minimum cycle, then judging the difference of the maximum cycle and minimum cycle: if the difference is greater than a threshold set by user, setting the hold-off time to the maximum cycle, the minimum cycle or the median cycle, then returning; otherwise terminating the adjustment of the hold-off time. At this point, the hold-off time is correctly set. Therefore, the present invention reduces the complexity and time consumption of the hold-off adjustment, and allows the test signal to be quickly and stably displayed on screen of DSO, meanwhile, which makes the trigger adjustment of DSO more convenient.

公开(公告)号：US20170003328A1

公开(公告)日：2017-01-05

申请号：US15146227

申请日：2016-05-04

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Qinchuan ZHANG ,  Kuojun YANG ,  Lianping GUO ,  Hao ZENG ,  Jia ZHAO ,  Jinpeng SONG

IPC: G01R19/25

CPC classification number: G01R13/0272 ,  G01R13/0254

Abstract: A method for measuring waveform capture rate (WRC) of DSO based on average dead time measurement. First generating ramp signal or symmetric triangular wave signal as base signal, a trigger signal, the frequency which is higher than the nominal maximum waveform capture rate of the DSO under measurement; secondly, setting the parameters of DSO for measuring; then obtaining a plurality of test signals by delaying base signal K times with different delay time, for each test signal, inputting it the trigger signal simultaneously to DSO, calculating dead time between two adjacent captured waveforms according to their initial voltages, finally calculating waveform capture rate based on average dead times. The waveform capture rate obtained can effectively reflect the overall capturing capacity of DSO, more tellingly, the waveform capturing capacity of acquisition system of DSO.

Abstract translation: 基于平均死区时间测量测量DSO的波形捕获率（WRC）的方法。 首先产生斜坡信号或对称三角波信号作为基准信号，触发信号，其频率高于测量的DSO的标称最大波形捕获率; 其次，设置测量用DSO的参数; 然后通过以不同的延迟时间延迟基本信号K次来获得多个测试信号，对于每个测试信号，将触发信号同时输入到DSO，根据它们的初始电压计算两个相邻捕获波形之间的死区时间，最后计算波形捕获 基于平均死亡时间。 获得的波形捕获率可以有效反映DSO的整体捕获能力，更具体地说，是DSO采集系统的波形捕获能力。

公开(公告)号：US20150188560A1

公开(公告)日：2015-07-02

申请号：US14584599

申请日：2014-12-29

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Wuhuang HUANG ,  Kuojun YANG ,  Houjun WANG ,  Jun JIANG ,  Hao ZENG ,  Duyu QIU ,  Peng YE ,  Qinchuan ZHANG ,  Shulin TIAN

IPC: H03M1/12

CPC classification number: H03M1/128 ,  G06F3/038 ,  G06F3/044 ,  G06T17/20 ,  H03M1/00 ,  H03M1/12 ,  H03M1/1285

Abstract: For the signal under acquisition which varies monotonically before and after the trigger time, a method for full-digital random sampling employs first sampled data before the trigger time and first sampled data after the trigger time to fit a curve, and obtains an intersection point of triggering level and the fitted curve, then, calculates the time interval between sampled data after the trigger time and the intersection point in the end, reconstructs the original signal, i.e. the signal under acquisition by a time interval of each acquisition. Thus, an analog trigger circuit and a time measurement circuit of conventional random sampling system can be eliminated, that simplifies the circuit design of data acquisition system and decreases its hardware complexity. Moreover, the higher sampling rate for the signal under acquisition is attained, and more waveform details are obtained.

Abstract translation: 对于在触发时间之前和之后单调变化的信号，全数字随机采样的方法在触发时间之前采用第一采样数据，并在触发时间之后采用第一采样数据以拟合曲线，并获得 触发电平和拟合曲线，然后计算触发时间之后的采样数据与最终交点之间的时间间隔，重建原始信号，即每次采集时间间隔内的采集信号。 因此，可以消除常规随机采样系统的模拟触发电路和时间测量电路，简化了数据采集系统的电路设计，降低了硬件复杂度。 此外，获得获取信号的较高采样率，并获得更多的波形细节。